import axios from 'axios'
// axios.defaults.headers.common['platform'] = 'MOBILE';
/*
ajax请求函数模块
返回值: promise对象(异步返回的数据是: response.data)
 */

export default function ajax(url, data = {}, flag, type = 'GET') {
    return new Promise(function(resolve, reject) {
        // 执行异步ajax请求
        let promise
        if (type === 'GET') {
            // 准备url query参数数据

            let dataStr = '' //数据拼接字符串
            Object.keys(data).forEach(key => {
                dataStr += key + '=' + data[key] + '&'
            })
            if (dataStr !== '') {
                dataStr = dataStr.substring(0, dataStr.lastIndexOf('&'))
                url = url + '?' + dataStr
            }
            if (flag) {
                var headers = {
                    headers: {
                        'platform': 'MOBILE'
                    }
                }
            } else {
                var headers = {}
            }


            // 发送get请求
            promise = axios.get(url, headers)
        } else {
            // 发送post请求
            promise = axios.post(url, data)
        }
        promise.then(function(response) {
            // 成功了调用resolve()
            resolve(response.data)
        }).catch(function(error) {
            //失败了调用reject()
            reject(error)
        })
    })
}